Exhaust-relief and continuous blast for engines



('No Model I J. 0. CARROLL.

EXHAUST RELIEF AND CONTINUOUS BLAST FOR ENGINES. No. 353,018. Patented Nov. 23, 1886 v wmko "Wihnafiezi WA i flwgy "2 a movmus UNrrEnn STATES PATENT OFFICE.

JOHN C. CARROLL, OF MILVVA-UKEE, WISCONSIN.

EXHAUST-RELI EF AND CONTINUOU BLASTFOR ENGINES.

I SPECIFICATION forming part of Letters Patent No. 353,018, dategl November 23, 1886.

Application filed July 3, i886. Serial'No. 207,058. (No model.)

.2" 0 all whom it may concern:

- Be it known that I, JOHN G. CARROLL, of Milwaukee, in the county of Milwaukee and State of Wisconsin, have invented a new and useful ExhaustRelief and ContinuousBlast for Engines; and I do'hereby declare the following to be a full, clear, and exact description of said invention, reference being bad to the accompanying drawings, and to the letters or figures of reference marked thereon, which form a part of this specification.

The objects of my invention are, first, to provide additional relief to an engine in cer tain contingencies from the reaction of its exhaust-steam; and, second, to secure a steady and continuous draft by means of a constant discharge of exhaust-steam through the smokedischarging passage, whereby great economy of fuel is secured.

The invention, to be hereinafter distinctly claimed, consists in the peculiar construction and arrangement of the parts of my newlyinvented device.

My invention is especially well adapted for use in locomotive-engines.

.In the accompanying drawings, Figure 1 is a vertical cross-section of a smoke-box of a locomotive, showing also the ends of the'steamcylinders and steam-chests and exhibiting my device in vertical section in connection therewith. The view is on line 00 w of Fig. 2. Fig. 2 is a vertical longitudinal section of parts of Fig. 1 on line y y of Fig. 1.

views.

A A are the steam-cylinders of a locomotive.

B B are the steam-chests, andG is the smokeboX at the base of the Smokestack.

D D are the exhaust steam pipes, leading from the cylinders into the smoke-box, being, in the locomotive in the drawings, shown as coming together just below the smoke-box, and entering the smoke-box in a single pipe, terminating in a nozzle, E. I

A cylinder, F, is provided with a steamtight piston, G, having a rigid stem, H, which passes through and is supported, and has reciprocal movement in the top of the hollow compressionnut I. The compression-nut I is externally screw threaded and turns in a corresponding {screw-thread in the rear head to force the piston G forward toward the opposite end of the cylinder F; A pair of eduction-pipes, L L, having their receiving ends at some place in the exhaust-pipes D D, and provided with check-valves N N, lead from the exhaust-pipes to the cylinder F, into which they open in front of the piston G. The receiving ends of the eduction-pipes L L have their mouths- (preferably trumpet+ shaped) open toward the cylinders A A, these educt-ion-pipes being adapted for receiving or taking a part of the exhaust-steam from the pipes D D as it ,is being discharged intermittingly therethrough and conveying it into the cylinder F. From the exhaust-steam cylinder F discharge-pipe M leads into the smoke-box C, and has its end preferably nearly coterminous 'with the end of the nozzle E.

Now, while the working-engine.discharges its steam intermittingly from the cylinders A A through the exhaust-pipes D D.into-the smoke-box 0, whereby a fluctuating draft is produced through the fire-box, fines, and smoke-stack, it will be seen that by my device a portion of the exhaust-steam will when being intermittingly discharged be taken from the pipes D D into the exhaust-steam cylinder F, forcing the piston G back upon the spring K, the recoil of which will when the pressure of the intermittinglydischarged steam ceases force the steam in the cylinder F out through the discharge-pipe M into the smoke-box in a stream lasting until the repeated discharge through pipes D D begins again, thus securing a constant outward. discharge of steam into the smoke-box and smokestack, whereby a correspondingly constant draft through the fire-box, fines, and smokestack is obtained and a steady but lessened consumption of fuel. is secured. As the exhausitpipes usually terminate in a contracted end or nozzle, (like nozzle 13],) and as -thereby when large amounts of steam arebeing rapidly discharged through the exhaust-pipes loo the steam is more or less impeded and dammed hindered, it will be seen that my device becomes an exhaust-relief, affording an auxiliary and independent way of egress for the exhauststeam from the pipes, thereby relieving them from their temporarily overburdened condition and obviating any liabilities of undue back-pressure from the exhauststeam.

I have shown and described two eductionpipes; but I do not wish to require two pipes unvaryingly, as one pipe would supply cylinder F with some steam and would to some extent relieve the exhaust-pipes; but two pipes are shown and described, as both exhaust-steam pipes should preferably be supplied with eductioupipes.

I am aware that a device has been constructed for taking the entire supply of exhaust-steam into a chamber against a reacting piston, as shown in English Patent No. 3,258 of 1874, and I do not claim the device there shown and described.

WVhat I claim as new and desire to secure by Letters Patent, is-

1. A stealncylinder,-F, provided with a steam and spring actuated piston, in combination with one or more eduetionpipes, L L, provided with check-valves, said pipes leading from the exhaust-steam pipes of an engine to the cylinder F, and a discharge-steam pipe, M, leading from the cylinder F into the smokebox of the engine, substantially as described.

2. In anengine,stearn-cylindersAA,smokebox 0, and exhaust-steam pipes D D, in combination with an exhaust-steam cylinder, F, provided with a steam and spring actuated piston, G, eduction-pipes L L, provided with check-valves N N, and a discharge-steam pipe, M, all substantially as described.

In testimony whereof I affix my signature in presence of two witnesses.

JOHN C. CARROLL.

'itnesses:

O. T. BENEDICT, E. R.- INMAN. 

